Quote:
Originally Posted by ausastronomer
Once this is done it is highly unlikely you will ever use the center spot on the secondary mirror, ever again. You certainly don't use it to collimate the telescope when it is assembled.
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John, you seem to agree that there is no need to spot the secondary mirror to perform periodic collimation. That is the point many of us are stating.
Even during a telescope construction, I do not see the need to spot the secondary mirror. There are better methods to figure out scope measurements.
David Kriege recommends spotting the secondary mirror to perform collimation and many disagree with him.
Jason